JP3321105B2 - Foreign matter removal device for reversible rolling mill auxiliary roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing foreign matter from an auxiliary roll of a reversible rolling mill suitable for removing foreign matter from an auxiliary roll of the reversible rolling mill.

[0002]

2. Description of the Related Art Cold rolling of difficult-to-work materials such as stainless steel and silicon steel is performed using a multi-high rolling mill such as a 12-high rolling mill or a 20-high rolling mill. FIG. 3 is a schematic side view showing an example of a 12-high rolling mill. As shown in the drawing, tension reels 2 and 2A are provided on the left and right sides of a rolling stand 1, and a rolled material 3 is rolled while reciprocating between the left and right tension reels 2 and 2A a plurality of times. In addition, 4, 4A is an auxiliary roll (deflector roll), 5, 5A is a shape detection roll,
6, 6A is a wiper roll.

According to such a so-called reversible rolling mill,
Difficult-to-work materials can be rolled to a desired thickness with one rolling roll stand. However, on the other hand, the auxiliary rolls 4 and 4A whose surfaces are not cleaned by the lubricating oil rotate forward,
By repeating the reversal, foreign substances such as abrasion powder, dust, iron powder, and oxide scale adhere to the auxiliary rolls 4 and 4A or the rolled material 3, and when the rolling is repeated as they are, these foreign substances bite on the surface of the rolled material 3. And roll flaws occur. Also,
The lubricating oil that has adhered to the rolled material and has not been completely removed by the wiper roll 6 or 6A adheres to the auxiliary rolls 4 and 4A, promoting adhesion of foreign matters and causing slip flaws.

[0004] In order to solve this problem, there has been known a method of preventing roll flaws and slip flaws by applying chromium plating to the surface of the auxiliary roll and then performing chromium plating thereon to improve abrasion resistance and pickup resistance. . However, in this method, since the roll roughness decreases as the rolling amount increases, the effect is lost within a short time after starting the rolling.

On the other hand, as means for removing foreign matter from an auxiliary roll of a reversible rolling mill, Japanese Patent Application Laid-Open Nos.
As described in Japanese Patent Application No. 58016, there is known a method in which two wiping members are alternately pressed against the surface of a rotating auxiliary roll to scrape foreign substances adhered to the roll surface. In both cases, according to the normal rotation and reverse rotation of the auxiliary roll, one of the two wiping members corresponding to the roll rotation direction is brought into contact with the roll, and the other wiping member is separated from the roll. At this time, foreign matter adhering to the roll surface can be effectively removed even at the time of reverse rotation. Japanese Patent Application Laid-Open No. Hei 9-12212 discloses that the life of the wiping member can be extended, and Japanese Patent Application Laid-Open No. Hei 10-58016 discloses an effect obtained by alternately contacting the wiping members. It is described that the foreign matter scraped off by the step can be prevented from re-adhering to the roll.

In Japanese Unexamined Patent Publication No. Hei 9-1212, the wiping member is a blade, which is a metal rectangular thin plate, such as an aluminum alloy or stainless steel. Further, in JP-A-10-58016, although not particularly limited, preferred wiping members are rubber, resin,
It is a sponge, a felt, etc., and the shape may be a square shape or a blade shape.

[0007]

However, the method disclosed in Japanese Patent Application Laid-Open No.
The device disclosed in Japanese Patent Application Laid-Open No. 1212 is suitable for scraping foreign matters because the contact piece with the roll surface is a metal blade, but is not suitable for wiping lubricating oil.
No. 016, the contact piece is made of rubber, resin, sponge,
Since it is felt or the like, it is suitable for wiping lubricating oil, but not suitable for scraping foreign substances. In both cases, every time the direction of rolling is changed, it is necessary to alternately repeat the operation of bringing one of the two wiping members into contact with the roll surface and simultaneously separating the other from the roll surface. Therefore, a mechanism and a control device for performing the contact / separation are required, which causes a problem that the equipment cost increases and the maintenance load is large.

Therefore, the present invention can perform both scraping of foreign matter and wiping of lubricating oil on the auxiliary roll of the reversible rolling mill, and furthermore, rewinding of foreign matter can be performed without bringing the wiping member into contact with or separating from the roll. It is an object of the present invention to provide a foreign matter removing device for a reversible rolling mill auxiliary roll which can prevent the foreign matter.

[0009]

SUMMARY OF THE INVENTION The present invention is an apparatus for wiping and removing foreign matter adhering to a roll surface of a reversible rolling mill by constantly bringing the tip of the wiper into contact with the roll surface of the auxiliary roll. A first wiper for wiping foreign matter and lubricating oil, and a second wiper for scraping foreign matter at a tip end of the wiper.

In the present invention, it is preferable that the tip of the first wiper is made of a felt plate and the tip of the second wiper is made of a resin blade. In the present invention, it is preferable that the first wiper and the second wiper in the forward posture are arranged so as to contact the auxiliary roll in this order along the forward direction from the contact point between the rolled material and the auxiliary roll.

In the present invention, the second wiper, the first wiper, and the second wiper, which are in the opposite posture, are arranged in this order from the contact point between the rolled material and the auxiliary roll in the forward direction. It is preferable to be arranged so as to contact with. In the present invention, the “forward direction” means the rotation direction of the auxiliary roll when the rolled material moves toward the rolling stand. The opposite case is referred to as “reverse direction”.

[0012] The "progressive posture" refers to a posture in which the cutting edge is directed from the front to a foreign object approaching in the forward direction. Note that the opposite case is referred to as “opposite posture”.

[0013]

FIG. 1 shows a first wiper and a second wiper.
FIG. 2 is a schematic side view showing an embodiment of the present invention provided for each stand.
In FIG. 1, a tension reel 2 (see FIG. 3) is disposed on the left side of the auxiliary roll 4, and a rolling stand 1 (see FIG. 3) is disposed on the right side of the shape detection roll 5.

Reference numeral 10 denotes a first wiper, which is constructed by detachably attaching a felt plate 11 forming the tip of the wiper to a holder 12. The holder 12 is attached to the frame 13 and always presses the end surface of the felt plate 11 against the roll surface of the auxiliary roll 4 (except during maintenance). Reference numeral 20 denotes a second wiper, which is constituted by detachably attaching a resin blade 21 forming the tip of the wiper to a holder 22. The holder 22 is attached to the frame 23 and the resin blade 21
Is constantly pressed against the roll surface at a predetermined angle (except during maintenance).

The method of attaching the tip of the wiper is pin fixing,
Any method of supporting by a rotating shaft or other well-known methods may be used. In short, the supporting method is not limited as long as it can be attached so that the auxiliary roll and the tip of the wiper can be brought into contact. The first wiper 10 is for wiping foreign substances such as abrasion powder, dust, iron powder, and oxide scale and excess lubricating oil from the roll surface. The material of the tip of the wiper does not cause scratches on the roll surface. Felt is preferred from the viewpoint that lubricating oil can be sufficiently impregnated. The shape may be the square plate shape in this example, or may be the shape of a pointed blade.

The second wiper 20 is for scraping the foreign matter from the roll surface, and for the purpose, it is preferable that the tip of the wiper is a member having a pointed shape, that is, a blade. The material is preferably a resin from the viewpoint that the material does not cause scratches on the roll surface and has a sufficient elastic modulus to peel off foreign matter from the roll surface. In addition, among the resins, those that do not generate scum due to friction with the roll surface and have heat resistance up to about 150 ° C. are more preferable. From such a viewpoint, epoxy resins, bakelite, nylon, polycarbonate, and the like, and It is preferable that these resins are reinforced with fibers or fillers. Copper is preferred other than resin.

Since the apparatus of the present invention is provided with the first wiper for wiping the lubricating oil and the foreign matter and the second wiper for wiping the foreign matter, the wiping and the wiping can be performed at the same time. It has excellent removal performance.
On the other hand, the apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 9-1212 is suitable for scraping because the contact piece with the roll surface is a metal blade, but is not suitable for wiping. In the device of -58016, the contact piece is made of rubber, resin,
Sponge, felt, etc. are suitable for wiping but not suitable for scraping.

The arrangement of the first and second wipers is, as shown in FIG.
It is preferable that the contact points A and B of the first and second wipers 10 and 20 are sequentially arranged in the forward direction (clockwise in FIG. 1). Further, it is preferable that the second wiper 20 is arranged in the normal posture. If the posture is opposite, it is difficult to scrape foreign matter in the forward direction.

With this arrangement, when the auxiliary roll 4 rotates in the reverse direction (counterclockwise in FIG. 1), it is wiped off by the felt plate 11 of the first wiper 10 and accumulated on the contact B side of the felt plate 11. Even if the foreign matter 30 adheres to the roll surface during the forward rotation, the foreign matter 30 is scraped off and captured by the resin blade 21 on the way to the contact point O, so that the foreign matter reaches the contact point O. Thus, it is possible to effectively prevent the material from being transferred to the rolling material 3 and conveyed to the rolling stand, invading the roll bite, and causing roll flaws.

In the present invention, since the tip end of the wiper is always in contact with the auxiliary roll, a simple pressing mechanism (spring, cylinder, etc.) is sufficient, and the conventional alternating contact and separation are required. No mechanism or control device is required, which is advantageous in terms of equipment costs and maintenance. By the way, in the apparatus shown in FIG. 1, when the auxiliary roll 4 rotates in the forward direction, the foreign matter 31 accumulates on the contact O side of the felt plate 11 and adheres to the roll surface when rotating in the reverse direction, returns to the contact O, and rolls on the tension reel. It is not prevented that the rolled material 3 that is being wound into a coil moves over and enters between the coil layers. Although it is unlikely that the foreign matter entering between the coil layers causes a product surface flaw, it is not that it is completely absent.

However, according to the present invention, two second wipers 20 are provided, for example, as shown in FIG. By placing the upstream side in the opposite direction and the downstream side in the forward direction along the direction, both foreign substances are effectively brought in to the rolling stand side and to the tension reel side. Can be prevented. The number of the second wipers is not limited to two as illustrated in FIG. 2, but may be any number as required.

Also, the first wiper is not limited to the one illustrated in FIG. 1, and when the amount of foreign matter generated and the amount of lubricating oil applied are large,
Any number may be installed as needed. In that case, for example, two second wipers may be installed in the forward posture and the other in the opposite posture, and a plurality of first wipers may be arranged between them.

[0023]

EXAMPLE Using a 12-high rolling mill (reversing rolling mill) shown in FIG. 3, a steel sheet is reciprocated between left and right tension reels 2 and 2A on an austenitic stainless steel sheet SUS304 and a ferritic stainless steel sheet SUS430. Cold rolling was performed by the method. Rolling was performed for each of the example in which one or two first and second wipers were installed on the left and right auxiliary rolls 4 and 4A, respectively, and the comparative example in which one of them was omitted. The defect rate due to occurrence was compared. The tip of the wiper of the first wiper was made of a felt plate, the tip of the wiper of the second wiper was made of a resin blade, and the resin was glass fiber reinforced epoxy resin.

The results are shown in Table 1. In the comparative example in which one of the first and second wipers was omitted, the defective rate was 3% or more, whereas in the example in which both the first and second wipers were installed, the defective rate was 1% or less. Met. In particular, in the example in which two second wipers were provided, the defect rate was 0%, and the surface flaw of the steel sheet could be completely prevented.

[0025]

[Table 1]

[0026]

As described above, according to the present invention, it is possible to perform both the scraping of the foreign matter and the wiping of the lubricating oil on the auxiliary roll of the reversible rolling mill, and the foreign matter can be removed without the wiping member coming into contact with or separating from the roll. It has an excellent effect that re-entanglement can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention in which first and second wipers are provided one by one.

FIG. 2 is a schematic side view showing an embodiment of the present invention in which one first wiper and two second wipers are provided.

FIG. 3 is a schematic side view showing an example of a 12-high rolling mill.

[Description of Signs] 1 Rolling stand 2, 2A Tension reel 3 Rolled material 4, 4A Auxiliary roll (deflector roll) 5, 5A Shape detection roll 6, 6A Wiper roll 10 First wiper 11 Felt plate 12, 22 Holder 13, 23 Frame 20 Second wiper 21 Resin blade 30, 31 Foreign matter

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Kasai 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corp. Chiba Works (56) References JP-A-4-309406 (JP, A) JP-A Heisei 10-58016 (JP, A) JP-A-9-1212 (JP, A) JP-A-60-136804 (JP, U) JP-A-4-78270 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 28/04 B21B 28/02 B21B 27/10

Claims (4)

(57) [Claims] An apparatus for wiping and removing foreign matter adhering to a roll surface by constantly contacting the tip of a wiper with the roll surface of an auxiliary roll of a reversible rolling mill, wherein the foreign matter and lubricating oil are wiped off by the tip of the wiper. A foreign matter removing device for a reversible rolling mill auxiliary roll, comprising: a first wiper; and a second wiper that scrapes foreign matter at a tip end of the wiper. 2. The reversible rolling mill auxiliary roll according to claim 1, wherein the wiper tip of the first wiper is made of a felt plate, and the wiper tip of the second wiper is made of a resin blade. apparatus. 3. A first wiper and a second wiper in a forward posture are arranged in the forward direction from a contact point between the rolled material and the auxiliary roll so as to contact the auxiliary roll in this order. Item 3. A foreign matter removing device for a reversible rolling mill auxiliary roll according to Item 1 or 2. 4. A second wiper, a first wiper, and a second wiper, which are in opposite postures, contact the auxiliary roll in this order along the forward direction from the contact point between the rolled material and the auxiliary roll. The foreign matter removing device for an auxiliary roll of a reversible rolling mill according to any one of claims 1 to 3, wherein the device is arranged.